The influence of the Lewis basicity of alkali polysulfide fluxes (A(2)S(x)) (A = alkali) as a function of x on the respective reactivities of Pb and Sn with Ge was studied and found to be strong. Cs(4)Pb(4)Ge(5)S(16), K(2)PbGe(2)S(6), and K(4)Sn(3)Ge(3)S(14) could be prepared only under low basicity with S/A(2)S ratios of > or =11. These compounds display complex frameworks and are semiconducto...

Kinetics of reversible oxygenation and carbon monoxide complex formation of the simple heme compounds pyrroheme-N-[3-(1-imidazolyl)propyl]amide and pyrroheme-3-(3-pyridyl)propyl ester have been measured in different solvent environments. The oxygen on and off rates and equilibria of these compounds can be made to closely match those of myoglobin, of hemoglobin alpha chains, or of the various st...

The gas phase basicity of the title compound has been determined to be greater than that of putrescine, making it the most basic primary diamine measured to date.

In order to clarify the mechanism for increase in oxygen content during electroslag remelting, this paper analyzes detail effect of slag components on gas and number, size composition inclusions ingots. The results show that, when CaF2-MgF2-CaO-MgO-SiO2 system is used ingots decreases clearly with basicity. When basicity 14~3.3, only 9~11 ppm. drops 2.3, increases 20 high also leads a decrease ...

Partition coefficients from water to organic solvents for phenoxide anions have been obtained using a method based on the variation of pK(a) of phenols with solvent. From these partition coefficients, the Abraham descriptors for phenoxide anions, on the same scale as descriptors for neutral molecules, have been obtained. Equations have been constructed for the prediction of descriptors, and val...

Two approaches for metal ion incorporation were employed to introduce Ca2+ into SBA-15; Direct Synthesis (DS) and Wet Impregnation (WI). The non-ionic template was removed by two different methods; calcination and solvent extraction. The obtained catalysts were characterized by means of X-Ray Powder Diffraction (XRD), Energy Dispersive X-ray (EDX), and FT-IR spectroscopy. The bas...